Exemplary extraction of the results of this study for the wavelength λ = 2.2 μm. If a combination of the parameters wavelength, disk size, and mass (focus on masses between 10^-3 M_⊙ and 10^-5 M_⊙) and inclination (focus on inclinations ≤ 45°) leads to a possible gap detection (see Sect. 2), the contrast between outer disk and star is color-coded. The colorbar is presented in log scale. Each disk model, indicated by the parameters scale height (^H/r), viscosity (α), and planet-to-star mass ratio (q), is presented in its own column. The fourth column presents the results for the disk model SP1, which is selected as an example in the text. The central object is a T Tauri star.